wordpress get_template_part_extra() lets you pass an array of variables to the template

get_template_part_extra()

<?php //called like this on other template get_template_part_extra('templates/products_accordion',[ 'key'=>'protection'] ); ?>

//inside the partial...
<h2>
	<?php echo( $template_args['key'] ); ?>
</h2>

passing parameters to template part

<?php
	
	/**
	 * Like get_template_part() but lets you pass args to the template file
	 * Args are available in the tempalte as $template_args array
	 * @param string filepart
	 * @param mixed wp_args style argument list
	 */
	function get_template_part_extra( $file, $template_args = array(), $cache_args = array() ) {
		$template_args = wp_parse_args( $template_args );
		$cache_args = wp_parse_args( $cache_args );
		if ( $cache_args ) {
			foreach ( $template_args as $key => $value ) {
				if ( is_scalar( $value ) || is_array( $value ) ) {
					$cache_args[$key] = $value;
				} else if ( is_object( $value ) && method_exists( $value, 'get_id' ) ) {
					$cache_args[$key] = call_user_method( 'get_id', $value );
				}
			}
			if ( ( $cache = wp_cache_get( $file, serialize( $cache_args ) ) ) !== false ) {
				if ( ! empty( $template_args['return'] ) )
					return $cache;
				echo $cache;
				return;
			}
		}
		$file_handle = $file;
		do_action( 'start_operation', 'hm_template_part::' . $file_handle );
		if ( file_exists( get_stylesheet_directory() . '/' . $file . '.php' ) )
			$file = get_stylesheet_directory() . '/' . $file . '.php';
		elseif ( file_exists( get_template_directory() . '/' . $file . '.php' ) )
			$file = get_template_directory() . '/' . $file . '.php';
		ob_start();
		$return = require( $file );
		$data = ob_get_clean();
		do_action( 'end_operation', 'hm_template_part::' . $file_handle );
		if ( $cache_args ) {
			wp_cache_set( $file, $data, serialize( $cache_args ), 3600 );
		}
		if ( ! empty( $template_args['return'] ) )
			if ( $return === false )
				return false;
			else
				return $data;
		echo $data;
	}